Blastocystis hominis; Friend or Foe

Area of Science:

• Medical Parasitology
• Gastroenterology
• Microbiology

Background:

• Blastocystis hominis (B. hominis) is the most frequently detected intestinal parasite in stool examinations.
• Determining whether B. hominis acts as a commensal or a pathogen is crucial for clinical management.
• Understanding its role is vital for deciding on appropriate treatment for gastrointestinal ailments.

Purpose of the Study:

• To review the association between B. hominis and irritable bowel syndrome (IBS).
• To review the association between B. hominis and inflammatory bowel disease (IBD).
• To evaluate the efficacy of antimicrobial therapy and provide treatment recommendations for B. hominis.

Main Methods:

• Literature review of in vitro studies, observational studies, and randomized controlled trials.
• Analysis of evidence linking B. hominis to IBS and IBD.
• Assessment of the impact of antimicrobial treatment on disease activity and symptoms.

Main Results:

• Evidence suggests a potential association between B. hominis and IBS/IBD symptoms.
• Antimicrobial therapy may improve symptoms in some patients with B. hominis infections.
• The pathogenicity of B. hominis is supported by various study designs.

Conclusions:

• B. hominis may play a role in the pathogenesis of IBS and IBD.
• Treatment decisions for B. hominis should be individualized based on clinical presentation.
• Further research is needed to fully elucidate the role of B. hominis in gastrointestinal diseases.